Hot spot manifold



Feb. 7, 1933. G. M. HOLLEY HOT SPOT MANIFOLD 3 Sheets-Sheet 1 Filed Nov.11 1929 GE /P65 M. H01. 1.5 X

INVENTOR ATToRNEY Feb. 7, 1933. G. M HOLLEY HOT SPOT MANIFOLD Filed Nov.11, 1929 3 Shets-Sheet 2 ATTORNEY Feb. 7, 1933. s. M. HOLLEY 1,896,085

HOT SPOT MANIFOLD Filed Nov. 11, 1929 3 Sheets-Sheet 3 INVENTOR.GEORGE/l HOLL E Y.

Patented Feb. 7, 1933 amass 1!. ROLL, OI DmBOT'I', MICHIGAN HOT SPOTHANII'OLD Application fled llovember 11, 1989. Serial No. 406,848.

This invention relates to a hot spot manifold adapted to be used with aninternal combustion engine on an automobile over which a current of airflows from the front 5 to the rear. The object of this invention is toprovide heating means whereb the rate of heating up of the inlet manifo(1 may be hastened, and to provide semi-thermostatic means which willautomatically prevent the inlet manifold temperature rlsin to such afigure as will materially reduce t e power.

It is understood of course that no attempt is made to keep the mixturetemperature even approximately constant as it is doubtful whether it isdesirable to have an absolutely constant temperature, and in any eventthis invention does-not produce that result.

Figure 1 shows the device in elevation.

Figure 2 shows a cross sectional elevation of lane 2-2 of Figure 1.

Figure 3 shows a partial section elevation taken on the plane 3-3 ofFigure 2 showing the thermostatic element.

Figure 4 shows the manifold mounted on an engine having the usualradiator and cooling fan.

In-the figures, A is the exhaust manifold having the outlet B to therear, a current of air flows from the front of the exhaust manifold A-to the rear, flowing from the radiator (not shown) being propelled by afan (not shown). The arrows in Figure 1 indicate this flow of air overthe exhaust manifold B. C is the inlet manifold having a flange D towhich a carburetor of any well known type is adapted to'be connected. Eis a valve in the exhaust outlet B, mounted on a shaft F to which isconnected a link or crank G which is connected through a link H with alever arm J, K (Figure 3) is the thermostatic element riveted to thelever J and connected to the shaft L, the thermostatic element is partlyenclosed by a casing or cover M, this casing M is anchored to the inletmanifold C by the screws N-N. The a.

shaft L is threaded into the cover M and locked in place by the lock nutO. In order that the valve E can be assembled in the exhaust manifold Aa cover P is provided which is held in place by 3 cap screws. The

inlet manifold C is provided with a jacket Q which communicates with theexhaust manifold A. The exhaust enters the jacket Q through an opening Rin the exhaust manifold A. The inlet manifold C is bolted to the exhaustmanifold by means of thecap screws U-U, a gasket being used to preventleaka S is a tube forming an outlet from the acket Q this tubecommunicating with an opening T in the outlet B of the exhaust manifold.'The openingT is adapted to be closed b the valve E when E is rotated ina c ockwise direction from the position shown in Fi re 1.

When the automobi e to which the device 1s applied, is started and thetemperature of the air fiowinglover the exhaust manifold is below 90 F.t en the valve E is in the'posi-- tion shown in Figure 1. The minute theengine begins to fire the exhaust gas escapes via the assa RQST to theexhaust outlet B and e wa ls of the inlet manifold C are therebg heated.Heat immediately flows from through the casing M to the thermostaticelement K contained therein. As this 1 element K is made of two metalswelded together the coil of metal unwinds and the lever J is rotated inan anti-clockwise direction about the center of the shaft L to which theelement K is anchored. The shaft L is threaded into M and is locked inplace by the lock nut O. The temperature at which the lever J begins tomove the valve E is therefore determined by the position to. which theshaft L is turned when the nut O is locked in place. The anticlockwiserotation of J turns the valve E in a clockwise direction, first openingthe exhaust manifold A so as to permit some of the exhaust to escadirect to B and finally closing the outlet from the pipe S, thus forcingall the exhaust gases to flow directly to the exhaust outlet B.

What I claim is:

1. In combination with an automobile operated by an internal combustionengine, an exhaust manifold having an exhaust outlet located to the rearof said engine, an inlet manifold associated with said exhaust manifold,an exhaust jacket partially surrounding 1 05 bustion engine comprisingan inlet manifold,

said inlet manifold, said exhaust jacket communicating with said exhaustmanifold, an outlet from said exhaust jacket communicating with theoutlet from said exhaust manifold, a valve in said exhaust outletadapted to close said outlet from said jacket and at the same time openthe exhaust manifold directly to the exhaust outlet, and alternatelyopen the said outlet from said jacket and close the exhaust manifolddirectly to the exhaust outlet, thermostatic means located entirely onthe outside of said inlet manifold and connected with said valve for thepurpose described.

2. In combination with an automobile operated by an internal combustionengine, an exhaust manifold having an exhaust outlet located to the rearof said engine, means for passing a current of air over said exhaustmanifold from the front to the rear, an inlet manifold associated withsaid exhaust manifold, an exhaust jacket partially surrounding saidinlet manifold, said exhaust acket conimunicating with said exhaustmanifold, an

- outlet from said exhaust jacket communi eating with the outlet fromsaid exhaust manifold, a valve in said exhaust outlet adapted toselectively obstruct and prevent the flow of exhaust gases from theexhaust manifold to the exhaust outlet and from the exhaust jacket tothe exhaust outlet, therm'ostatic means located entirely on the outsideof said inlet manifold so as to be heated thereby and located in the airstream flowing over the exhaust manifold, said thermostatic means beingconnected with said valve for the purpose described.

3. A thermostatic means for controlling the mixture temperature in aninternal combustion engine comprising an inlet manifold, an exhaustmanifold and an exhaust jacket partially surrounding said inlet manifoldand communicating with said exhaust manifold, an outlet from saidexhaust jacket, an

' outlet from said exhaust manifold, a double acting valve controllingthe common outlet from said jacket and said exhaust manifold, said valvebeing adapted to alternately open the exhaust manifold directly to theexhaust outlet andat the same time close the exhaust jacket outlet andto alternately open the outlet from the exhaust jacket and close theoutlet from the exhaust manifold, a casting bolted to the outside of themanifold, a shaft threaded therein, a thermostatic element 10 catedentirely on the outside of said inlet manifold and connected to saidshaft, said shaft being adjustable with relation to the said cap, alever connected to the said thermostatic element, link means connectingthe lever with said double acting valve for the purpose described.

4. A thermostatic means for controlling the mixture temperature in aninternal coman exhaust manifold and an exhaust jacket partiallysurrounding said inlet manifold and communicating with said exhaustmanifold, an outlet from said exhaust jacket, an outlet from saidexhaust manifold, a double acting valve controlling the common outletfrom said jacket and said exhaust manifold, said valve being adapted toalternately open the exhaust manifold directly to the exhaust outlet andat the same time close the exhaust jacket outlet and to alternately 0 enthe outlet from the exhaust jacket and clhse the outlet from the exhaustjacket and close the outlet from the exhaust manifold, a casing boltedto the outside of the manifold, a shaft threaded therein, a thermostaticelement in the form of a helix located entirely on the outside of saidinlet manifold and connected to said shaft, said shaft being adjustablewith relation to the said cap, a lever connectedto the said thermostaticelement, link means connecting the lever with said double acting valvefor the purpose described.

5. An internal combustion en ine having an exhaust pipe, an inlet maniold, an exhaust jacket partially surrounding said inlet manifold-saidjacket being in communication with said exhaust pipe, a valvein theexhaust pipe controlling the flow of exhaust gases through said jacket,a thermostatic element located entirely on the outside of the inletmanifold, link means extending from said thermostatic element to thesaid valve whereby the flow of heat through said ex haust jacket isautomatically restricted as the temperature of said thermostatic elementis raised by the increase in the temperature of the inlet manifold andthe temperature of the air surrounding said inlet manifold.

6. An internal combustion engine having an exhaust pipe, an inletmanifold, means for passing a current of air over said inlet manifoldafter said current of air has per-' formed the function of cooling theengine, an exhaust jacket partially surroundingsaid inlet manifold, saidjacket being in communication with said exhaust pipe, a valve in theexhaust pipe controlling the flow of exhaust gases through said jacket,a thermostatic element located entirely on the outside of the inletmanifold, link means extending from said thermostatic element to thesaid valve whereby the flowof heat through said exhaust jacket isautomatically restricted as the temperature of said thermostatic elementis raised by the increase in the temperature of'the inlet manifold andthe temperature of the air surrounding said inlet manifold.

In testimony whereof I aflix my signature.

GEORGE M. HOLLEY.

